CN203596799U - Automatic switching power amplifier power supply circuit and device - Google Patents
Automatic switching power amplifier power supply circuit and device Download PDFInfo
- Publication number
- CN203596799U CN203596799U CN201320761110.0U CN201320761110U CN203596799U CN 203596799 U CN203596799 U CN 203596799U CN 201320761110 U CN201320761110 U CN 201320761110U CN 203596799 U CN203596799 U CN 203596799U
- Authority
- CN
- China
- Prior art keywords
- triode
- input
- voltage
- electric capacity
- power supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Amplifiers (AREA)
Abstract
The utility model discloses an automatic switching power amplifier power supply circuit and device. The automatic switching power amplifier power supply circuit is connected between a power amplifier power supply and an audio power amplification device, and comprises a power supply input end, a power supply output control module, a power supply switching module and a voltage multiplying module. According to the automatic switching power amplifier power supply circuit, two paths of supply voltages output by the power amplifier power supply are detected through the power supply output control module and the power supply switching module, the power supply output control module has control over whether the supply voltages are output to the audio power amplification device to carry out power supply or not according to the detection result, the power supply switching module switches the output paths of the supply voltages when one path of supply voltages has a fault, the magnitude of supply voltage of the normal path is doubled in a conversion mode through the voltage multiplying module, power supply is carried out on the audio power amplification device through the converted supply voltage instead of the failure supply voltage, normal operation of the audio power amplification device is ensured, and the phenomenon that an audio power amplification device is damaged due to the fact that supply voltages have failures is avoided.
Description
Technical field
The utility model relates to power technique fields, relates in particular to a kind of automatic switchover amplifier power supply circuit and device.
Background technology
At present; audio amplifier adopts the mode of dual power supply mostly; in the time that the duplex feeding voltage of amplifier power supply is all normally exported; audio amplifier is normally worked, and in the time that a certain road supply power voltage wherein breaks down, audio amplifier cannot normally be worked; even in the time that a certain road supply power voltage breaks down; the protection of can not being correlated with, for example, cut off the power supply of amplifier power supply in time, will cause the damage of audio amplifier.
Utility model content
Main purpose of the present utility model is to propose a kind of automatic switchover amplifier power supply circuit and device, when being intended to amplifier power supply Yi road supply power voltage and breaking down, guarantee that audio amplifier normally works, avoid audio amplifier extremely to damage because of supply power voltage.
In order to achieve the above object, the utility model proposes a kind of automatic switchover amplifier power supply circuit, this automatic switchover amplifier power supply circuit is connected between amplifier power supply and audio amplifier, comprising:
Be used for the power input of the duplex feeding voltage of inputting described amplifier power supply output;
For detection of described supply power voltage, and whether export according to supply power voltage described in testing result control the power supply output control module that described audio amplifier is powered to;
For detection of described supply power voltage, and the output of described amplifier power supply wherein a road supply power voltage breaks down time switch the electrical source exchange module of another road supply power voltage outgoing route; And
For the supply power voltage of described electrical source exchange module output is converted to after original twice, export times die block that described audio amplifier is powered to; Wherein,
Described power input is connected with the output of described amplifier power supply; The input of described power supply output control module is connected with described power input, and the output of described power supply output control module is connected with the feeder ear of described audio amplifier; The input of described electrical source exchange module is connected with described power input, and the output of described electrical source exchange module is connected with the input of described times of die block, and the output of described times of die block is connected with the feeder ear of described audio amplifier.
Preferably, described power input comprises the first power input and second source input, described power supply output control module comprises the first control unit and the second control unit, described electrical source exchange module comprises the first switch unit and the second switch unit, described times of die block comprises the first voltage doubling unit and the second voltage doubling unit, and the feeder ear of described audio amplifier comprises the first feeder ear and the second feeder ear;
Described second source input is connected with the control end of the input of the input of described the first control unit, described the first switch unit, described the second control unit and the control end of described the second switch unit respectively; Described the first power input is connected with the input of the control end of the control end of described the first control unit, described the first switch unit, described the second control unit and the input of described the second switch unit respectively;
The output of described the first control unit is connected with the first feeder ear of described audio amplifier, and the output of described the second control unit is connected with the second feeder ear of described audio amplifier; The output of described the first switch unit is connected with the input of described the first voltage doubling unit, and the output of described the second switch unit is connected with the input of described the second voltage doubling unit; The output of described the first voltage doubling unit is connected with the first feeder ear of described audio amplifier, and the output of described the second voltage doubling unit is connected with the second feeder ear of described audio amplifier.
Preferably, described the first control unit comprises the first reference voltage input terminal, the first triode, the second triode, the first resistance, the second resistance, the 3rd resistance, the first electric capacity and the second electric capacity;
The emitter of described the first triode is connected with described second source input, the base stage of described the first triode is connected with described second source input via described the first resistance, and be connected with the collector electrode of described the second triode via described the second resistance, the collector electrode of described the first triode is connected with the first feeder ear of described audio amplifier;
The base stage of described the second triode is connected with the first power input via described the 3rd resistance, and the emitter of described the second triode is connected with described the first reference voltage input terminal;
One end of described the first electric capacity is connected with described second source input, the other end ground connection of described the first electric capacity; One end of described the second electric capacity is connected with the collector electrode of described the first triode, the other end ground connection of described the second electric capacity.
Preferably, described the second control unit comprises the second reference voltage input terminal, the 3rd triode, the 4th triode, the 4th resistance, the 5th resistance, the 6th resistance, the 3rd electric capacity and the 4th electric capacity;
The emitter of described the 3rd triode is connected with described the first power input, the base stage of described the 3rd triode is connected with described the first power input via described the 4th resistance, and be connected with the collector electrode of described the 4th triode via described the 5th resistance, the collector electrode of described the 3rd triode is connected with the second feeder ear of described audio amplifier;
The base stage of described the 4th triode is connected with second source input via described the 6th resistance, and the emitter of described the 4th triode is connected with described the second reference voltage input terminal;
One end of described the 3rd electric capacity is connected with described the first power input, the other end ground connection of described the 3rd electric capacity; One end of described the 4th electric capacity is connected with the collector electrode of described the 3rd triode, the other end ground connection of described the 4th electric capacity.
Preferably, described the first switch unit comprises the 3rd reference voltage input terminal, the 5th triode, the 6th triode, the 7th resistance, the 8th resistance, the 9th resistance, the 5th electric capacity and the 6th electric capacity;
The emitter of described the 5th triode is connected with described second source input, the base stage of described the 5th triode is connected with described second source input via described the 7th resistance, and be connected with the collector electrode of described the 6th triode via described the 8th resistance, the collector electrode of described the 5th triode is connected with the input of described the first voltage doubling unit;
The base stage of described the 6th triode is connected with the first power input via described the 9th resistance, and the emitter of described the 6th triode is connected with described the 3rd reference voltage input terminal;
One end of described the 5th electric capacity is connected with described second source input, the other end ground connection of described the 5th electric capacity; One end of described the 6th electric capacity is connected with the collector electrode of described the 5th triode, the other end ground connection of described the 6th electric capacity.
Preferably, described the second switch unit comprises the 4th reference voltage input terminal, the 7th triode, the 8th triode, the tenth resistance, the 11 resistance, the 12 resistance, the 5th electric capacity and the 6th electric capacity;
The emitter of described the 7th triode is connected with described the first power input, the base stage of described the 7th triode is connected with described the first power input via described the tenth resistance, and be connected with the collector electrode of described the 8th triode via described the 11 resistance, the collector electrode of described the 7th triode is connected with the input of described the second voltage doubling unit;
The base stage of described the 8th triode is connected with second source input via described the 12 resistance, and the emitter of described the 8th triode is connected with described the 4th reference voltage input terminal;
One end of described the 7th electric capacity is connected with described the first power input, the other end ground connection of described the 7th electric capacity; One end of described the 8th electric capacity is connected with the collector electrode of described the 7th triode, the other end ground connection of described the 8th electric capacity.
Preferably, described the first triode is NPN triode, described the second triode is NPN triode, described the 3rd triode is PNP triode, described the 4th triode is PNP triode, and described the 5th triode is NPN triode, and described the 6th triode is PNP triode, described the 7th triode is PNP triode, and described the 8th triode is NPN triode.
Preferably, described the first voltage doubling unit comprises the first bidirectional diode, the 9th electric capacity, the tenth electric capacity, the first electrochemical capacitor and the first multiplication of voltage output;
The public pole of described the first bidirectional diode is connected with the collector electrode of described the 5th triode via described the 9th resistance, and the anode of described the first bidirectional diode is connected with described the first multiplication of voltage output, the minus earth of described the first bidirectional diode;
The anodic bonding of one end of described the tenth electric capacity and described the first bidirectional diode, the other end ground connection of described the tenth electric capacity; The anodic bonding of the negative pole of described the first electrochemical capacitor and described the first bidirectional diode, the plus earth of described the first electrochemical capacitor.
Preferably, described the second voltage doubling unit comprises the second bidirectional diode, the 11 electric capacity, the 12 electric capacity, the second electrochemical capacitor and the second multiplication of voltage output;
The public pole of described the second bidirectional diode is connected with the collector electrode of described the 7th triode via described the 11 electric capacity, the plus earth of described the second bidirectional diode, and the negative electrode of described the second bidirectional diode is connected with described the second multiplication of voltage output;
One end of described the 12 electric capacity is connected with the negative electrode of described the second bidirectional diode, the other end ground connection of described the 12 electric capacity; The positive pole of described the second electrochemical capacitor is connected with the negative electrode of described the second bidirectional diode, the minus earth of described the second electrochemical capacitor.
The utility model also proposes a kind of automatic switchover amplifier power supply device, and this automatic switchover amplifier power supply device comprises automatic switchover amplifier power supply circuit, and this automatic switchover amplifier power supply circuit is connected between amplifier power supply and audio amplifier, comprising:
Be used for the power input of the duplex feeding voltage of inputting described amplifier power supply output;
For detection of described supply power voltage, and whether export according to supply power voltage described in testing result control the power supply output control module that described audio amplifier is powered to;
For detection of described supply power voltage, and the output of described amplifier power supply wherein a road supply power voltage breaks down time switch the electrical source exchange module of another road supply power voltage outgoing route; And
For the supply power voltage of described electrical source exchange module output is converted to after original twice, export times die block that described audio amplifier is powered to; Wherein,
Described power input is connected with the output of described amplifier power supply; The input of described power supply output control module is connected with described power input, and the output of described power supply output control module is connected with the feeder ear of described audio amplifier; The input of described electrical source exchange module is connected with described power input, and the output of described electrical source exchange module is connected with the input of described times of die block, and the output of described times of die block is connected with the feeder ear of described audio amplifier.
The automatic switchover amplifier power supply circuit the utility model proposes, detect the duplex feeding voltage of amplifier power supply output by power supply output control module, and whether export audio amplifier to according to testing result control supply power voltage and power, electrical source exchange module also detects the duplex feeding voltage of amplifier power supply output simultaneously, Qie mono-road supply power voltage switches another road supply power voltage outgoing route while breaking down, and by times die block, the supply power voltage of electrical source exchange module output is converted to after original twice, exporting audio amplifier to powers.Thereby, in the duplex feeding voltage of amplifier power supply output, when You Yi road supply power voltage breaks down, times die block is converted to another road supply power voltage after original twice, replace original supply power voltage to power to audio amplifier, guarantee that audio amplifier normally works, avoided audio amplifier to damage because supply power voltage breaks down.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the utility model automatic switchover amplifier power supply circuit preferred embodiment;
Fig. 2 is the theory diagram of the utility model automatic switchover amplifier power supply circuit one specific embodiment;
Fig. 3 is the electrical block diagram of amplifier power supply circuit of automatically switching shown in Fig. 2.
The realization of the purpose of this utility model, functional characteristics and advantage, in connection with embodiment, and is described further with reference to accompanying drawing.
Embodiment
Further illustrate the technical solution of the utility model below in conjunction with Figure of description and specific embodiment.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
The utility model proposes a kind of automatic switchover amplifier power supply circuit.
With reference to Fig. 1, Fig. 1 is the theory diagram of the utility model automatic switchover amplifier power supply circuit preferred embodiment.
In the utility model preferred embodiment, automatic switchover amplifier power supply circuit 100 is connected between amplifier power supply (not shown) and audio amplifier 200, and this automatic switchover amplifier power supply circuit 100 comprises power input VIN, power supply output control module 110, electrical source exchange module 120 and die block 130 doubly.Power input VIN is for the duplex feeding voltage of input work discharge source output, power supply output control module 110 is for detection of supply power voltage, and whether export audio amplifier 200 to according to testing result control supply power voltage and power, electrical source exchange module 120 is for detection of supply power voltage, and amplifier power supply output wherein a road supply power voltage breaks down time switch another road supply power voltage outgoing route, times die block 130 is converted to after original twice for the supply power voltage that electrical source exchange module 120 is exported, exporting audio amplifier 200 to powers.
Wherein, power input VIN is connected with the output of amplifier power supply; The input of power supply output control module 110 is connected with power input VIN, and the output of power supply output control module 110 is connected with the feeder ear of audio amplifier 200; The input of electrical source exchange module 120 is connected with power input VIN, and the output of electrical source exchange module 120 is connected with the input of times die block 130, and the output of times die block 130 is connected with the feeder ear of audio amplifier 200.
In the present embodiment, by the duplex feeding voltage of power input VIN input work discharge source output, this duplex feeding voltage comprises positive supply voltage (as+12V) and negative supply power voltage (as-12V).Power supply output control module 110 detects the duplex feeding voltage of amplifier power supply output, and whether export audio amplifier 200 to according to testing result control supply power voltage and power, in the time that the duplex feeding voltage of amplifier power supply output is all normally exported, 110 conductings of power supply output control module, supply power voltage is output to the feeder ear of audio amplifier 200, power to audio amplifier 200, audio amplifier 200 is normally worked; When the duplex feeding voltage Zhong You mono-road supply power voltage of amplifier power supply output breaks down, if positive supply voltage is lower than default minimum voltage threshold values, or negative supply power voltage is during higher than default ceiling voltage threshold values, power supply output control module 110 turn-offs, and cuts off another road supply power voltage of amplifier power supply and exports to audio amplifier 200.Simultaneously, electrical source exchange module 120 also detects the duplex feeding voltage of amplifier power supply output, and discharge source output wherein a road supply power voltage breaks down time the output of switch discharges source the outgoing route of another road supply power voltage, be that another road supply power voltage that power supply output control module 110 cuts off above-mentioned amplifier power supply is when exporting to audio amplifier 200, electrical source exchange module 120 exports another road supply power voltage of above-mentioned amplifier power supply to times die block 130, and above-mentioned another road supply power voltage of electrical source exchange module 120 being exported by times die block 130 is converted to after original twice, exporting audio amplifier 200 to powers.
With respect to prior art, automatic switchover amplifier power supply circuit 100 of the present utility model, in the duplex feeding voltage of amplifier power supply output, when You Yi road supply power voltage breaks down, times die block 130 is converted to another road supply power voltage after original twice, replace original supply power voltage to power to audio amplifier 200, guaranteed that audio amplifier 200 normally works, avoid audio amplifier 200 to damage because supply power voltage breaks down.
Refer again to Fig. 2, Fig. 2 is the theory diagram of the utility model automatic switchover amplifier power supply circuit one specific embodiment.
As shown in Figure 2, power input VIN comprises the first power input V11 and second source input V12, power supply output control module 110 comprises the first control unit 111 and the second control unit 112, electrical source exchange module 120 comprises the first switch unit 121 and the second switch unit 122, times die block 130 comprises the first voltage doubling unit 131 and the second voltage doubling unit 132, and the feeder ear of audio amplifier 200 comprises the first feeder ear and the second feeder ear.
Second source input V12 is connected with the input of the first control unit 111, input, the control end of the second control unit 112 and the control end of the second switch unit 122 of the first switch unit 121 respectively; The first power input V11 is connected with the control end of the first control unit 111, control end, the input of the second control unit 112 and the input of the second switch unit 122 of the first switch unit 121 respectively.
The output of the first control unit 111 is connected with the first feeder ear of audio amplifier 200, and the output of the second control unit 112 is connected with the second feeder ear of audio amplifier 200; The output of the first switch unit 121 is connected with the input of the first voltage doubling unit 131, and the output of the second switch unit 122 is connected with the input of the second voltage doubling unit 132; The output of the first voltage doubling unit 131 is connected with the first feeder ear of audio amplifier 200, and the output of the second voltage doubling unit 132 is connected with the second feeder ear of audio amplifier 200.
Refer again to Fig. 3, Fig. 3 is the electrical block diagram of amplifier power supply circuit of automatically switching shown in Fig. 2.
As shown in Figure 3, the first control unit 111 comprises the first reference voltage input terminal V21, the first triode Q1, the second triode Q2, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the first capacitor C 1 and the second capacitor C 2.In the present embodiment, the first triode Q1 is NPN triode, and the second triode Q2 is NPN triode.
The emitter of the first triode Q1 is connected with second source input V12, the base stage of the first triode Q1 is connected with second source input V12 via the first resistance R 1, and be connected with the collector electrode of the second triode Q2 via the second resistance R 2, the collector electrode of the first triode Q1 is connected with the first feeder ear of audio amplifier 200.
The base stage of the second triode Q2 is connected with the first power input V11 via the 3rd resistance R 3, and the emitter of the second triode Q2 is connected with the first reference voltage input terminal V21.
One end of the first capacitor C 1 is connected with second source input V12, the other end ground connection of the first capacitor C 1; One end of the second capacitor C 2 is connected with the collector electrode of the first triode Q1, the other end ground connection of the second capacitor C 2.
Particularly, the second control unit 112 comprises the second reference voltage input terminal V22, the 3rd triode Q3, the 4th triode Q4, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 3rd capacitor C 3 and the 4th capacitor C 4.In the present embodiment, the 3rd triode Q3 is PNP triode, and the 4th triode Q4 is PNP triode.
The emitter of the 3rd triode Q3 is connected with the first power input V11, the base stage of the 3rd triode Q3 is connected with the first power input V11 via the 4th resistance R 4, and be connected with the collector electrode of the 4th triode Q4 via the 5th resistance R 5, the collector electrode of the 3rd triode Q3 is connected with the second feeder ear of audio amplifier 200.
The base stage of the 4th triode Q4 is connected with second source input V12 via the 6th resistance R 6, and the emitter of the 4th triode Q4 is connected with the second reference voltage input terminal V22.
One end of the 3rd capacitor C 3 is connected with the first power input V11, the other end ground connection of the 3rd capacitor C 3; One end of the 4th capacitor C 4 is connected with the collector electrode of the 3rd triode Q3, the other end ground connection of the 4th capacitor C 4.
Particularly, the first switch unit 121 comprises the 3rd reference voltage input terminal V23, the 5th triode Q5, the 6th triode Q6, the 7th resistance R 7, the 8th resistance R 8, the 9th resistance R 9, the 5th capacitor C 5 and the 6th capacitor C 6.In the present embodiment, the 5th triode Q5 is NPN triode, and the 6th triode Q6 is PNP triode.
The emitter of the 5th triode Q5 is connected with second source input V12, the base stage of the 5th triode Q5 is connected with second source input V12 via the 7th resistance R 7, and be connected with the collector electrode of the 6th triode Q6 via the 8th resistance R 8, the collector electrode of the 5th triode Q5 is connected with the input of the first voltage doubling unit 131.
The base stage of the 6th triode Q6 is connected with the first power input V11 via the 9th resistance R 9, and the emitter of the 6th triode Q6 is connected with the 3rd reference voltage input terminal V23.
One end of the 5th capacitor C 5 is connected with second source input V12, the other end ground connection of the 5th capacitor C 5; One end of the 6th capacitor C 6 is connected with the collector electrode of the 5th triode Q5, the other end ground connection of the 6th capacitor C 6.
Particularly, the second switch unit 122 comprises the 4th reference voltage input terminal V24, the 7th triode Q7, the 8th triode Q8, the tenth resistance R the 10, the 11 resistance R the 11, the 12 resistance R 12, the 5th capacitor C 5 and the 6th capacitor C 6.In the present embodiment, the 7th triode Q7 is PNP triode, and the 8th triode Q8 is NPN triode.
The emitter of the 7th triode Q7 is connected with the first power input V11, the base stage of the 7th triode Q7 is connected with the first power input V11 via the tenth resistance R 10, and be connected with the collector electrode of the 8th triode Q8 via the 11 resistance R 11, the collector electrode of the 7th triode Q7 is connected with the input of the second voltage doubling unit 132.
The base stage of the 8th triode Q8 is connected with second source input V12 via the 12 resistance R 12, and the emitter of the 8th triode Q8 is connected with the 4th reference voltage input terminal V24.
One end of the 7th capacitor C 7 is connected with the first power input V11, the other end ground connection of the 7th capacitor C 7; One end of the 8th capacitor C 8 is connected with the collector electrode of the 7th triode Q7, the other end ground connection of the 8th capacitor C 8.
Particularly, the first voltage doubling unit 131 comprises the first bidirectional diode D1, the 9th capacitor C 9, the tenth capacitor C 10, the first electrochemical capacitor CE1 and the first multiplication of voltage output V31.In the present embodiment, the internal structure of the first bidirectional diode D1 is connected and composed in the same way by two diodes, comprise public pole a1, anode a2 and negative electrode a3, wherein public pole a1 is first negative electrode of a diode of bidirectional diode D1 inside and the common port of the anodic bonding of another diode.
The public pole a1 of the first bidirectional diode D1 is connected with the collector electrode of the 5th triode Q5 via the 9th resistance R 9, the anode a2 of the first bidirectional diode D1 is connected with the first multiplication of voltage output V31, the negative electrode a3 ground connection of the first bidirectional diode D1, the first multiplication of voltage output V31 is connected with the first feeder ear of audio amplifier 200.
One end of the tenth capacitor C 10 is connected with the anode a2 of the first bidirectional diode D1, the other end ground connection of the tenth capacitor C 10; The negative pole of the first electrochemical capacitor CE1 is connected with the anode a2 of the first bidirectional diode D1, the plus earth of the first electrochemical capacitor CE1.
Particularly, the second voltage doubling unit 132 comprises the second bidirectional diode D2, the 11 capacitor C the 11, the 12 capacitor C 12, the second electrochemical capacitor CE2 and the second multiplication of voltage output V32.In the present embodiment, the internal structure of the second bidirectional diode D2 is connected and composed in the same way by two diodes, comprise public pole b1, anode b2 and negative electrode b3, wherein public pole b1 is second negative electrode of a diode of bidirectional diode D2 inside and the common port of the anodic bonding of another diode.
The public pole b1 of the second bidirectional diode D2 is connected with the collector electrode of the 7th triode Q7 via the 11 capacitor C 11, the anode b2 ground connection of the second bidirectional diode D2, the negative electrode b3 of the second bidirectional diode D2 is connected with the second multiplication of voltage output V32, and the second multiplication of voltage output V32 is connected with the second feeder ear of audio amplifier 200.
One end of the 12 capacitor C 12 is connected with the negative electrode b3 of the second bidirectional diode D2, the other end ground connection of the 12 capacitor C 12; The positive pole of the second electrochemical capacitor CE2 is connected with the negative electrode b3 of the second bidirectional diode D2, the minus earth of the second electrochemical capacitor CE2.
Below with amplifier power supply output+12V and-12V duplex feeding voltage, from the supply power voltage of the first power input V11 input be+12V, from the supply power voltage of second source input V12 input be-12V, from the reference voltage of the first reference voltage input terminal V21 input be+1.3V, from the reference voltage of the second reference voltage input terminal V22 input be-1.3V, from the reference voltage of the 3rd reference voltage input terminal V23 input be+2.7V, from the reference voltage of the 4th reference voltage input terminal V24 input be-2.7V, + 2V is+the minimum voltage threshold values of 12V supply power voltage,-2V is-the ceiling voltage threshold values of 12V supply power voltage, the first triode Q1, the second triode Q2, the 3rd triode Q3, the 4th triode Q4, the 5th triode Q5, the 6th triode Q6, it is example that the conducting voltage of the 7th triode Q7 and the 8th triode Q8 is 0.7V, operation principle to the utility model automatic switchover amplifier power supply circuit 100 describes:
In the time that the duplex feeding voltage of amplifier power supply output is all normally exported, from the first power input V11 input+12V supply power voltage, from second source input V12 input-12V supply power voltage.
In the first control unit 111, input+12V supply power voltage of the first power input V11 is input to the base stage of the second triode Q2 via the 3rd resistance R 3, input+1.3V reference voltage of the first reference voltage input terminal V21 is input to the emitter of the second triode Q2, thereby the second triode Q2 conducting, now+1.3V reference voltage is via the second triode Q2, the second resistance R 2 is input to the base stage of the first triode Q1, and second source input V12 input-12V supply power voltage is input to the emitter of the first triode Q1, thereby the first triode Q1 conducting,-12V supply power voltage exports the first feeder ear of audio amplifier 200 to via the first triode Q1.
In the second control unit 112, input-12V supply power voltage of second source input V12 is input to the base stage of the 4th triode Q4 via the 6th resistance R 6, input-1.3V reference voltage of the second reference voltage input terminal V22 is input to the emitter of the 4th triode Q4, thereby the 4th triode Q4 conducting, now-1.3V reference voltage is via the 4th triode Q4, the 5th resistance R 5 is input to the base stage of the 3rd triode Q3, and first power input V11 input+12V supply power voltage is input to the emitter of the 3rd triode Q3, thereby the 3rd triode Q3 conducting, + 12V supply power voltage exports the second feeder ear of audio amplifier 200 to via the 3rd triode Q3.
In the first switch unit 121, input+12V supply power voltage of the first power input V11 is input to the base stage of the 6th triode Q6 via the 9th resistance R 9, input+2.7V reference voltage of the 3rd reference voltage input terminal V23 is input to the emitter of the 6th triode Q6, thereby the 6th triode Q6 cut-off, now input-12V supply power voltage of second source input V12 is input to the base stage of the 5th triode Q5 via the 7th resistance R 7, and second source input V12 input-12V supply power voltage is input to the emitter of the 5th triode Q5, thereby the 5th triode Q5 cut-off, now the first voltage doubling unit 131 is not worked.
In the second switch unit 122, input-12V supply power voltage of second source input V12 is input to the base stage of the 8th triode Q8 via the 12 resistance R 12, input-2.7V reference voltage of the 4th reference voltage input terminal V24 is input to the emitter of the 8th triode Q8, thereby the 8th triode Q8 cut-off, now input+12V supply power voltage of the first power input V11 is input to the base stage of the 7th triode Q7 via the tenth resistance R 10, and first power input V11 input+12V supply power voltage is input to the emitter of the 7th triode Q7, thereby the 7th triode Q7 cut-off, now the second voltage doubling unit 132 is not worked.
Hence one can see that, when the duplex feeding voltage of amplifier power supply is normally exported, + 12V and-12V supply power voltage exports respectively the first feeder ear and second feeder ear of audio amplifier 200 to, power to audio amplifier 200, thereby audio amplifier 200 normally worked.
When amplifier power supply output+12V supply power voltage breaks down, while changing to from+12V be less than+2V, from the be less than+2V of voltage of the first power input V11 input, from second source input V12 input-12V supply power voltage.
In the first control unit 111, be less than+2V of the base voltage of the second triode Q2, the emitter voltage of the second triode Q2 is+1.3V, pressure reduction between base stage, the emitter of the second triode Q2 is less than 0.7V, the second triode Q2 cut-off, thereby the first triode Q1 also ends, and cut-out-12V supply power voltage is exported to audio amplifier 200.
In the first switch unit 121, be less than+2V of the base voltage of the 6th triode Q6, the emitter voltage of the 6th triode Q6 is+2.7V, the emitter of the 6th triode Q6, pressure reduction between base stage is greater than 0.7V, thereby the 6th triode Q6 conducting, input+2.7V reference voltage of the 3rd reference voltage input terminal V23 is via the 6th triode Q6, the 8th resistance R 8 is input to the base stage of the 5th triode Q5, and the emitter voltage of the 5th triode Q5 is-12V, thereby the 5th triode Q5 conducting,-12V supply power voltage is exported to the first voltage doubling unit 131 via the 5th triode Q5.
It should be noted that at this, amplifier power supply belongs to Switching Power Supply, therefore amplifier power supply output+12V and-12V supply power voltage is PWM(Pulse Width Modulation, pulse width modulation) signal.
In the first voltage doubling unit 131, when-12V supply power voltage is during in positive half cycle, the public pole a1 of the first bidirectional diode D1, conducting between anode a2, voltage in the 9th capacitor C 9 equals the voltage of second source input V12 input, when-12V supply power voltage is during in negative half period, the public pole a1 of the first bidirectional diode D1, conducting between negative electrode a3, the voltage that voltage in the tenth capacitor C 10 equals second source input V12 input adds the voltage in the 9th capacitor C 9, thereby the equal-24V of voltage in the tenth capacitor C 10, from the voltage of the first multiplication of voltage output V31 output be-24V, therefore to export the voltage of the first feeder ear of audio amplifier 200 to be-24V to the first voltage doubling unit 131, meet the required operating voltage of the normal work of audio amplifier 200, audio amplifier 200 is normally worked.
Hence one can see that, amplifier power supply output+12V supply power voltage is while breaking down, the first voltage doubling unit 131 be converted to-24V of general-12V supply power voltage, power to audio amplifier 200, audio amplifier 200 is normally worked.
When amplifier power supply output-12V supply power voltage breaks down, while changing to from-12V be greater than-2V, from the first power input V11 input+12V supply power voltage, the be greater than-2V of voltage inputting from second source input V12.
In the second control unit 112, be greater than-2V of the base voltage of the 4th triode Q4, the emitter voltage of the 4th triode Q4 is-1.3V, pressure reduction between emitter, the base stage of the 4th triode Q4 is less than 0.7V, the 4th triode Q4 cut-off, thereby the 3rd triode Q3 also ends, and cut-out+12V supply power voltage is exported to audio amplifier 200.
In the second switch unit 122, be greater than-2V of the base voltage of the 8th triode Q8, the emitter voltage of the 8th triode Q8 is-2.7V, the base stage of the 8th triode Q8, pressure reduction between emitter is greater than 0.7V, thereby the 8th triode Q8 conducting, input-2.7V reference voltage of the 4th reference voltage input terminal V24 is via the 8th triode Q8, the 11 resistance R 11 is input to the base stage of the 7th triode Q7, and the emitter voltage of the 7th triode Q7 is+12V, thereby the 7th triode Q7 conducting,-12V supply power voltage is exported to the second voltage doubling unit 132 via the 7th triode Q7.
In the second voltage doubling unit 132, when+12V supply power voltage is during in positive half cycle, the public pole b1 of the second bidirectional diode D2, conducting between negative electrode b3, voltage in the 11 capacitor C 11 equals the voltage of the first power input V11 input, when+12V supply power voltage is during in negative half period, the public pole b1 of the second bidirectional diode D2, conducting between anode b2, the voltage that voltage in the 12 capacitor C 12 equals the first power input V11 input adds the voltage in the 11 capacitor C 11, thereby the equal+24V of voltage in the 12 capacitor C 12, from the voltage of the second multiplication of voltage output V32 output be+24V, therefore to export the voltage of the second feeder ear of audio amplifier 200 to be+24V to the second voltage doubling unit 132, meet the required operating voltage of the normal work of audio amplifier 200, audio amplifier 200 is normally worked.
Hence one can see that, amplifier power supply output-12V supply power voltage is while breaking down, the second voltage doubling unit 132 be converted to+24V of general+12V supply power voltage, power to audio amplifier 200, audio amplifier 200 is normally worked.
Understandablely be, in the utility model, set if change+the minimum voltage threshold values of 12V voltage, the ceiling voltage threshold values of-12V voltage, the first reference voltage input terminal V21, the second reference voltage input terminal V22, the reference voltage of the 3rd reference voltage input terminal V23 and the 4th reference voltage input terminal V24 input also will correspondingly change, for example, by the minimum voltage threshold value setting of+12V voltage be+4V, the ceiling voltage threshold value setting of-12V voltage is-4V, should be+the 3.3V of reference voltage inputting from the first reference voltage input terminal V21, from the should be-3.3V of reference voltage of the second reference voltage input terminal V22 input, from the should be+4.7V of reference voltage of the 3rd reference voltage input terminal V23 input, from the should be-4.7V of reference voltage of the 4th reference voltage input terminal V24 input, this is not restricted.
The utility model also proposes a kind of automatic switchover amplifier power supply device, this automatic switchover amplifier power supply device comprises automatic switchover amplifier power supply circuit 100, structure, the operation principle of this automatic switchover amplifier power supply circuit 100 and the beneficial effect bringing, all with reference to embodiment, repeat no more herein.
The foregoing is only preferred embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model specification and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (10)
1. an automatic switchover amplifier power supply circuit, is connected between amplifier power supply and audio amplifier, it is characterized in that, comprising:
Be used for the power input of the duplex feeding voltage of inputting described amplifier power supply output;
For detection of described supply power voltage, and whether export according to supply power voltage described in testing result control the power supply output control module that described audio amplifier is powered to;
For detection of described supply power voltage, and the output of described amplifier power supply wherein a road supply power voltage breaks down time switch the electrical source exchange module of another road supply power voltage outgoing route; And
For the supply power voltage of described electrical source exchange module output is converted to after original twice, export times die block that described audio amplifier is powered to; Wherein,
Described power input is connected with the output of described amplifier power supply; The input of described power supply output control module is connected with described power input, and the output of described power supply output control module is connected with the feeder ear of described audio amplifier; The input of described electrical source exchange module is connected with described power input, and the output of described electrical source exchange module is connected with the input of described times of die block, and the output of described times of die block is connected with the feeder ear of described audio amplifier.
2. automatic switchover amplifier power supply circuit as claimed in claim 1, it is characterized in that, described power input comprises the first power input and second source input, described power supply output control module comprises the first control unit and the second control unit, described electrical source exchange module comprises the first switch unit and the second switch unit, described times of die block comprises the first voltage doubling unit and the second voltage doubling unit, and the feeder ear of described audio amplifier comprises the first feeder ear and the second feeder ear;
Described second source input is connected with the control end of the input of the input of described the first control unit, described the first switch unit, described the second control unit and the control end of described the second switch unit respectively; Described the first power input is connected with the input of the control end of the control end of described the first control unit, described the first switch unit, described the second control unit and the input of described the second switch unit respectively;
The output of described the first control unit is connected with the first feeder ear of described audio amplifier, and the output of described the second control unit is connected with the second feeder ear of described audio amplifier; The output of described the first switch unit is connected with the input of described the first voltage doubling unit, and the output of described the second switch unit is connected with the input of described the second voltage doubling unit; The output of described the first voltage doubling unit is connected with the first feeder ear of described audio amplifier, and the output of described the second voltage doubling unit is connected with the second feeder ear of described audio amplifier.
3. automatic switchover amplifier power supply circuit as claimed in claim 2, it is characterized in that, described the first control unit comprises the first reference voltage input terminal, the first triode, the second triode, the first resistance, the second resistance, the 3rd resistance, the first electric capacity and the second electric capacity;
The emitter of described the first triode is connected with described second source input, the base stage of described the first triode is connected with described second source input via described the first resistance, and be connected with the collector electrode of described the second triode via described the second resistance, the collector electrode of described the first triode is connected with the first feeder ear of described audio amplifier;
The base stage of described the second triode is connected with the first power input via described the 3rd resistance, and the emitter of described the second triode is connected with described the first reference voltage input terminal;
One end of described the first electric capacity is connected with described second source input, the other end ground connection of described the first electric capacity; One end of described the second electric capacity is connected with the collector electrode of described the first triode, the other end ground connection of described the second electric capacity.
4. automatic switchover amplifier power supply circuit as claimed in claim 3, it is characterized in that, described the second control unit comprises the second reference voltage input terminal, the 3rd triode, the 4th triode, the 4th resistance, the 5th resistance, the 6th resistance, the 3rd electric capacity and the 4th electric capacity;
The emitter of described the 3rd triode is connected with described the first power input, the base stage of described the 3rd triode is connected with described the first power input via described the 4th resistance, and be connected with the collector electrode of described the 4th triode via described the 5th resistance, the collector electrode of described the 3rd triode is connected with the second feeder ear of described audio amplifier;
The base stage of described the 4th triode is connected with second source input via described the 6th resistance, and the emitter of described the 4th triode is connected with described the second reference voltage input terminal;
One end of described the 3rd electric capacity is connected with described the first power input, the other end ground connection of described the 3rd electric capacity; One end of described the 4th electric capacity is connected with the collector electrode of described the 3rd triode, the other end ground connection of described the 4th electric capacity.
5. automatic switchover amplifier power supply circuit as claimed in claim 4, it is characterized in that, described the first switch unit comprises the 3rd reference voltage input terminal, the 5th triode, the 6th triode, the 7th resistance, the 8th resistance, the 9th resistance, the 5th electric capacity and the 6th electric capacity;
The emitter of described the 5th triode is connected with described second source input, the base stage of described the 5th triode is connected with described second source input via described the 7th resistance, and be connected with the collector electrode of described the 6th triode via described the 8th resistance, the collector electrode of described the 5th triode is connected with the input of described the first voltage doubling unit;
The base stage of described the 6th triode is connected with the first power input via described the 9th resistance, and the emitter of described the 6th triode is connected with described the 3rd reference voltage input terminal;
One end of described the 5th electric capacity is connected with described second source input, the other end ground connection of described the 5th electric capacity; One end of described the 6th electric capacity is connected with the collector electrode of described the 5th triode, the other end ground connection of described the 6th electric capacity.
6. automatic switchover amplifier power supply circuit as claimed in claim 5, it is characterized in that, described the second switch unit comprises the 4th reference voltage input terminal, the 7th triode, the 8th triode, the tenth resistance, the 11 resistance, the 12 resistance, the 5th electric capacity and the 6th electric capacity;
The emitter of described the 7th triode is connected with described the first power input, the base stage of described the 7th triode is connected with described the first power input via described the tenth resistance, and be connected with the collector electrode of described the 8th triode via described the 11 resistance, the collector electrode of described the 7th triode is connected with the input of described the second voltage doubling unit;
The base stage of described the 8th triode is connected with second source input via described the 12 resistance, and the emitter of described the 8th triode is connected with described the 4th reference voltage input terminal;
One end of described the 7th electric capacity is connected with described the first power input, the other end ground connection of described the 7th electric capacity; One end of described the 8th electric capacity is connected with the collector electrode of described the 7th triode, the other end ground connection of described the 8th electric capacity.
7. automatic switchover amplifier power supply circuit as claimed in claim 6, it is characterized in that, described the first triode is NPN triode, described the second triode is NPN triode, and described the 3rd triode is PNP triode, and described the 4th triode is PNP triode, described the 5th triode is NPN triode, described the 6th triode is PNP triode, and described the 7th triode is PNP triode, and described the 8th triode is NPN triode.
8. automatic switchover amplifier power supply circuit as claimed in claim 5, is characterized in that, described the first voltage doubling unit comprises the first bidirectional diode, the 9th electric capacity, the tenth electric capacity, the first electrochemical capacitor and the first multiplication of voltage output;
The public pole of described the first bidirectional diode is connected with the collector electrode of described the 5th triode via described the 9th resistance, the anode of described the first bidirectional diode is connected with described the first multiplication of voltage output, the minus earth of described the first bidirectional diode, described the first multiplication of voltage output is connected with the first feeder ear of described audio amplifier;
The anodic bonding of one end of described the tenth electric capacity and described the first bidirectional diode, the other end ground connection of described the tenth electric capacity; The anodic bonding of the negative pole of described the first electrochemical capacitor and described the first bidirectional diode, the plus earth of described the first electrochemical capacitor.
9. automatic switchover amplifier power supply circuit as claimed in claim 6, is characterized in that, described the second voltage doubling unit comprises the second bidirectional diode, the 11 electric capacity, the 12 electric capacity, the second electrochemical capacitor and the second multiplication of voltage output;
The public pole of described the second bidirectional diode is connected with the collector electrode of described the 7th triode via described the 11 electric capacity, the plus earth of described the second bidirectional diode, the negative electrode of described the second bidirectional diode is connected with described the second multiplication of voltage output, and described the second multiplication of voltage output is connected with the second feeder ear of described audio amplifier;
One end of described the 12 electric capacity is connected with the negative electrode of described the second bidirectional diode, the other end ground connection of described the 12 electric capacity; The positive pole of described the second electrochemical capacitor is connected with the negative electrode of described the second bidirectional diode, the minus earth of described the second electrochemical capacitor.
10. an automatic switchover amplifier power supply device, is characterized in that, comprises the automatic switchover amplifier power supply circuit described in any one in claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320761110.0U CN203596799U (en) | 2013-11-25 | 2013-11-25 | Automatic switching power amplifier power supply circuit and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320761110.0U CN203596799U (en) | 2013-11-25 | 2013-11-25 | Automatic switching power amplifier power supply circuit and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203596799U true CN203596799U (en) | 2014-05-14 |
Family
ID=50677655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320761110.0U Expired - Fee Related CN203596799U (en) | 2013-11-25 | 2013-11-25 | Automatic switching power amplifier power supply circuit and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203596799U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105098966A (en) * | 2015-06-26 | 2015-11-25 | 天长市富安电子有限公司 | Power supply switching circuit |
| CN107995564A (en) * | 2018-01-25 | 2018-05-04 | 东莞市源康电子有限公司 | A kind of audio amplifier circuit of negative and positive dual power power supply |
-
2013
- 2013-11-25 CN CN201320761110.0U patent/CN203596799U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105098966A (en) * | 2015-06-26 | 2015-11-25 | 天长市富安电子有限公司 | Power supply switching circuit |
| CN105098966B (en) * | 2015-06-26 | 2017-07-28 | 天长市富安电子有限公司 | A kind of power supply switch circuit |
| CN107995564A (en) * | 2018-01-25 | 2018-05-04 | 东莞市源康电子有限公司 | A kind of audio amplifier circuit of negative and positive dual power power supply |
| CN107995564B (en) * | 2018-01-25 | 2023-08-08 | 东莞市源康电子有限公司 | Audio amplifying circuit powered by positive and negative dual power supplies |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101114797B (en) | Constant voltage supply circuit | |
| CN203368132U (en) | Power switching circuit and dual-power supply device | |
| CN104467379B (en) | The switch tube driving circuit of bridge switch topology | |
| CN103457232A (en) | Short-circuit protection circuit of direct-current load and illuminator | |
| CN103683470A (en) | Power supply device with power supply backup mechanism | |
| CN203301611U (en) | Direct-current switching circuit and switching power source | |
| CN104218531A (en) | Short circuit protecting circuit and method | |
| CN202586329U (en) | Self-discharge circuit | |
| CN203858468U (en) | Air conditioner standby power consumption control circuit and air conditioner | |
| CN203596799U (en) | Automatic switching power amplifier power supply circuit and device | |
| CN103425057A (en) | Switch circuit and electronic device with same | |
| CN204556715U (en) | A kind of zero cross detection circuit and convertible frequency air-conditioner | |
| CN101534110A (en) | IGBT current-limiting drive circuit | |
| CN204967263U (en) | Buffer circuit and dual power supply system | |
| CN203632222U (en) | Output short circuit protection circuit of flyback converter | |
| CN203368003U (en) | Dual protection device for Boost circuit | |
| CN111082640B (en) | Positive and negative excitation auxiliary power supply circuit and positive and negative excitation power supply circuit | |
| CN104821554A (en) | DC/DC power input overvoltage and under-voltage protection device composed of voltage-stabilizing tube | |
| CN204882781U (en) | High -power converter drives detection circuitry in advance | |
| CN204068210U (en) | Short-circuit protection circuit | |
| CN101420123B (en) | Solar energy controller preventing reverse connection of accumulator | |
| CN203445783U (en) | Circuit topology structure of redundancy constant voltage power supply | |
| CN203337775U (en) | An IGBT status detecting circuit | |
| CN203027014U (en) | Dual-power supply circuit and audio-visual player | |
| CN201707398U (en) | Three-phase power supply input open-phase detecting circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140514 Termination date: 20211125 |